SAKEUR, MariemSupervisor: Bourahla, MustaphaSupervisor: Fernini, L. Belabdelouahab2023-05-312023-05-312016-06-10http://dspace.univ-msila.dz:8080//xmlui/handle/123456789/39091To facilitate the automatic transformation of the OWL ontologies to relational databases, we propose a group of rules to transform these ontologies by using XSL. Our project was based on Protégé 5 tool to create the owl source ontology, SQL Server management studio 2008 as environment for the target relational databases, Oxygen XML Editor 16.1 as a language to create the transformation stylesheet that includes the rules and Visual studio 2012 as the programming environment with C sharp progranhming language.enOntologies, relational databases, transformation, OWL, SQL.Thesis